Whippet Skin Cancer Dog Has Problems With Dry Patches On Her Ears?

Dog has problems with dry patches on her ears? - whippet skin cancer

When we had our dog from the Humane Society last February, most of the skin of his ears. She also had quarter-sized spot on the top of his bald head. The hair on his head and ears is short and smooth as velvet (there is a lab / greyhound mix). When he was added to a vet again in February, they have to test a skin scraping to Itch - negative. He said he had a severe infection in the ear (literally: black and infected) and was probably scratching his skin. We were given medication to clean your ears and hear the ear infection about 2 weeks was clean and your skin will grow back.

Well, yesterday I realized what happened again. Only this time, the ears are clean inside. They K9 Advantix, which the 1st of each month applies. I do not know what the cause ... Ideas?